Well, interestingly enough, I found that going to the upper end Nordost cables, (i.e. Valhallas), that I actually bettered the treble response of my system. (My amps are just a bit slightly dark sounding, and the Valhalla cables really managed to get every last bit of treble response out of the them. I am very satisfied with the sound that I have now.)
The cables that they replaced are what I am recommending to you though. The Jena Labs Pathfinders are incredible cables. The mid-range is very musical, (more so than the Valhalla cables are actually). However, they seemed to me to be just a touch rolled off in the upper most region of the treble. (And when combined with my amps, this became more than just a touch, as it became more readily apparent.) My friend uses these same cables, and they sound great in his system, with no treble roll off that is at all noticable. (FYI, his amps do not have the slight darkness to them that mine do, so unless your amps are slightly dark sounding, these should work great for you).
My two cents worth.
Good Luck in your search!
The cables that they replaced are what I am recommending to you though. The Jena Labs Pathfinders are incredible cables. The mid-range is very musical, (more so than the Valhalla cables are actually). However, they seemed to me to be just a touch rolled off in the upper most region of the treble. (And when combined with my amps, this became more than just a touch, as it became more readily apparent.) My friend uses these same cables, and they sound great in his system, with no treble roll off that is at all noticable. (FYI, his amps do not have the slight darkness to them that mine do, so unless your amps are slightly dark sounding, these should work great for you).
My two cents worth.
Good Luck in your search!